geochemistry

You've got a coordinate. You've got a pile of regions on a map. You need to know: which region does this point fall in, or is it inside one at all? That single question hides inside a lot of features: Geofencing: is this device or user inside the zone? Service / delivery areas: does this address fall in our coverage? Spatial lookups: which territory, district, or catchment owns this point? They a…

Scientists found that thawing permafrost can trigger increased rock weathering, a natural process that absorbs CO2 from the atmosphere. In some regions, this carbon uptake was strong enough to fully offset — or even surpass — river greenhouse gas emissions.

Determining the lower limits of pore and throat sizes for shale oil occurrence is essential for reservoir evaluation, yet existing methods yield a single fixed threshold that fails to capture the heterogeneity of interbedded systems. This study addresses this limitation through integrated characterization of 59 core samples from the Chang 7 Member, Longdong area, Ordos Basin, using high-pressure …

Nature Geoscience, Published online: 17 June 2026; doi:10.1038/s41561-026-02018-w Heat flux across the core–mantle boundary is laterally variable, and heat may flow into the core beneath hot piles of dense material such as large low-shear-wave-velocity provinces, according to mantle thermochemical convection models.

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Nature Communications, Published online: 16 June 2026; doi:10.1038/s41467-026-74667-9 Thermochemical decomposition and carbon isotopes reveal lithological controls on petrogenic and biospheric organic carbon fluxes; while climate-driven ecosystem change may substantially enhance biospheric carbon sequestration in Antarctic fjords.

Nature Geoscience, Published online: 16 June 2026; doi:10.1038/s41561-026-02012-2 The burial of terrestrially derived organic carbon in coastal marine sediments greatly increased during the Palaeocene–Eocene Thermal Maximum, probably helping to draw down a large portion of carbon released during the hyperthermal event, according to biomarker records from five sites.

Rapid demand for energy has led to an increase in new techniques for hydrocarbon exploration to avoid uncertainty. Evaluating hydrocarbon potential and estimating porosity is a persistent challenge using seismic and well log data in reservoirs. Seismic post-stacked inversion is a robust method for detailed reservoir characterization that produces more precise and comprehensive subsurface images t…

Nature Geoscience, Published online: 15 June 2026; doi:10.1038/s41561-026-02000-6 Time-resolved X-ray diffraction experiments in a laser-heated diamond anvil cell suggest that hydrogen in iron hydride becomes highly mobile at Earth’s core pressures and high temperatures. The measurements provide experimental indications of a superionic state in which hydrogen moves through a crystalline iron latt…

Scientific Data, Published online: 15 June 2026; doi:10.1038/s41597-026-07625-1 A comprehensive global dataset of river nutrient concentrations, loads and streamflow

Scientific Reports, Published online: 15 June 2026; doi:10.1038/s41598-026-57584-1 Lithological control of natural radioactivity in Baltic coastal sands and implications for pre-operational radiological monitoring

Scientific Reports, Published online: 15 June 2026; doi:10.1038/s41598-026-55096-6 Benchmarking water saturation models for the Mishrif formation using dean–stark data

A practical Geophysical Research Letters submission-process walkthrough: the AGU submission workflow, the 12-Publication-Unit letters cap, Associate-Editor routing across earth and space sciences, the rapid review cadence, and what each decision means.

Nature Geoscience, Published online: 12 June 2026; doi:10.1038/s41561-026-02004-2 Carbon dioxide hydrates on the seafloor are sustained by the venting of liquid CO2 associated with volcanic activity near Mayotte Island, according to observations from remotely operated vehicles and geochemical analyses.

Nature Geoscience, Published online: 11 June 2026; doi:10.1038/s41561-026-02019-9 Magmatism induced by a mantle plume bearing a relatively high proportion of dense fusible mantle material may have formed the Ontong Java Plateau, the largest extant oceanic plateau, according to thermodynamic modelling.

Nature Communications, Published online: 11 June 2026; doi:10.1038/s41467-026-74313-4 Hg isotopes reveal a negative Δ¹⁹⁹Hg–δ²⁰²Hg relationship restricted to Permian–Triassic crisis intervals, indicating enhanced volcanic Hg loading and providing a framework for tracing Siberian Traps eruptive pulses and environmental change.

1. INTRODUCTION Land cover classification is one of the most important applications of remote sensing, as it helps in monitoring urban expansion, studying vegetation cover, identifying water bodies, and analyzing land use. Many traditional classification methods rely on classifying each pixel independently; however, this approach can produce noisy maps, especially when using Sentinel-2 imagery wi…

The efficient development of deep coal-rock gas resources, exemplified by the pioneering No. 8 coal seam (buried >2000 m) in the Daning-Jixian Block, Ordos Basin, is of strategic importance. This study investigates the critical role of fracturing fluid flowback behavior in determining post-fracturing productivity. Based on systematic analysis of flowback parameters and dynamic data, we evaluate t…

The Penggongmiao complex pluton, located in the Nanling metallogenic belt of South China, provides a critical record of Early Paleozoic (Caledonian) magmatism, but the genesis and mineralization potential of the biotite monzogranite of the pluton have not been constrained. This study presents new whole-rock geochemistry, zircon U–Pb ages, and Sr–Nd–Hf isotopic data for the Penggongmiao biotite mo…